The assessement materials described in this report were used by the Indigenous Mathematics Project to document various achievement and cognitive development factors at five sites in Papua New Guinea. The achievement instruments are criteria-referenced and consist of the Primary Maths Achievement Test, The Test of Arithmetic Skills, and the reading and dictation tests. There are also seven cognitive assessment tasks, assessing visual memory, M-space, class inclusion, conservation of number, logical classification, seriation (double), and conservation of length. Instructions for administration and a list of materials needed are provided for each instrument. The appendix contains the data collection sheet, a coding sheet, and each achievement test. (MNS)